/*
 * Copyright 2011 Christoph Ludwig (christoph[at]chludwig.de). All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package de.chludwig.ehumanities.provenance.jaxb;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;
import javax.xml.transform.stream.StreamSource;

/**
 * 
 */
public class UnmarshallUtil {

  /**
   * @param source
   * @return
   * @throws JAXBException
   */
  public static JAXBElement<WorkflowContainerMetadataType> workflowContainerMetadataElement(StreamSource source)
          throws JAXBException {
    Class<WorkflowContainerMetadataType> valueClass = WorkflowContainerMetadataType.class;
    JAXBElement<WorkflowContainerMetadataType> elem = metadataElement(source, valueClass);
    return elem;
  }

  /**
   * @param source
   * @return
   * @throws JAXBException
   */
  public static JAXBElement<LogEntryMetadataType> logEntryMetadataElement(StreamSource source)
          throws JAXBException {
    Class<LogEntryMetadataType> valueClass = LogEntryMetadataType.class;
    JAXBElement<LogEntryMetadataType> elem = metadataElement(source, valueClass);
    return elem;
  }

  /**
   * @param source
   * @param valueClass
   * @return
   * @throws JAXBException
   */
  public static <T> JAXBElement<T> metadataElement(StreamSource source, Class<T> valueClass) throws JAXBException {
    JAXBContext jc = ContextFactory.getContext();
    Unmarshaller u = jc.createUnmarshaller();
    u.setSchema(HPTSchemaFactory.createWorkflowContainerSchema());
    JAXBElement<T> elem = u.unmarshal(source, valueClass);
    return elem;
  }

}
